Speaker
Abhisek Sen
(Georgia State University)
Description
Quarkonia suppression is one of the highly cited
signature of quark gluon plasma (QGP) formed in relativistic heavy
ion collisions. PHENIX observed a high suppression of $J/\Psi$
production in Au+Au collisions at $\sqrt{s}=200$ GeV. However,
theoretical predictions remain diverse due to lack of precise
knowledge of heavy flavor meson production, suppression,
regeneration in hot and dense medium and other cold nuclear
effects. In order to separate these effects the PHENIX
collaboration also measured $J/\Psi$ production in d+Au collisions
at $\sqrt{s}=200$ GeV for isolating cold nuclear effects and Au+Au
collisions at low energies ($\sqrt{s}=62$ GeV and 39 GeV) to study
the onset of nuclear phase transition to QGP. The idea being that
the critical energy density for a crossover into the QGP phase may
not be reached for certain combinations. The measurement of
$J/\Psi$ nuclear modification factors at different center of mass
energies may elucidate this transition and supplement our
understanding of the energy dependence of cold nuclear matter
effects. \\
In this talk, we will show the latest results of $J/\Psi$ and
Upsilon measurements from p+p, d+Au collisions at $\sqrt{s}=200$
GeV and several energy scans of Au+Au collisions.
Primary author
Abhisek Sen
(Georgia State University)
